Continuous kiln.



PATENTED JUNE 9, 190.3.

W. P. GRATH.

CONTINUOUS KILN.

APPLIOATION FILED DBO. 5, 1902.

N0 MODEL.

' PAT'ENTED JUNE 9, 1903. A W. P. GRATH.

G0I\l'.[I1STU0lS- KILN. APPLloATIoN FILED DB0. 5, 1902.

no MODEL.

SHEETS--SHEBT 2.'

N1.. 730,820. PATBNTED JUNEQ,'1903.L

' w. P. GRATH.

CONTINUOUS KILN.

` APPLIUATION FILED DEU. 6, 1902.

.' NO MODEL. l 3 SHEETS-SHEET 3.

Fig 3.

n El m El NITED STATES Patented June 9, 1903.

Price.

PATENT CONTINUOUS KILN.

SPECIFCATION forming' part of Letters Patent No. 730,820, dated June 9,1903.

Application tiled December 5, 1902. Serial No134,005. (No model.)

To a/ZZ whom, it may concer-1c:

Be it known that I, WALTER P. GRATH, a citizen of the United States, anda resident of the city of St. Louis and State of Missouri, have inventeda new and useful Continuous Kiln, of which the following is aspecication.

My invention relates to continuous-kilns, and has for its principalobjects to utilize the Waste heat from one chamber for the watersmokingand initial heating of another chamber and to secure a uniformdistribution of the heat throughout each chamber.

To these ends my invention consists in the arrangements andconstructions of parts hereinafter described and claimed.

In the accompanying drawings,wherein like symbols refer to like partswherever they occur, Figure 1 is a horizontal view, partly in plan andpartly in section, on the three planes designated by the broken line 1 1of Fig. 2. Fig. 2 is a vertical View, partly in elevation and partly insection, along the broken line 2 2 of Fig. 1. Fig. 3 is a verticalcross-section of a kiln on the planes indicated by the broken line 3 3of Fig. 1, and Fig. 4 is a diagrammatic plan view of a continuous kiln.

My continuous kiln comprises several chambers 1, each provided with itsown furnaces 2, arranged, preferably, on opposite sides of the chamber,and eachfurnace is provided with a flash-wall 3, extending from theiioor upwardly inside of the chamber, so as to form a bag for the kiln.The main iloor4 of each kiln-chamber has perforations 5 therethrough andis formed, preferably, of tile having depressed spaces in their edges.The perforated tile Hoor is supported bya series of separate ribs orwalls 6, extending lengthwise of the kiln, and the spaces thus formedbelow the kiln are divided by a horizontal partition 7 into an upper anda lower set of floor-fines S. The oor-flues of the upper set are dividedby a partition-wall 9, extending transversely across the kiln-chamberfrom flash- Wall to flash-wall near the middle of the chamber.-Extending transversely across each kiln-chamber at one end thereof andbelow the floor is a main outlet-due 10, into which all of thefloor-fines 8 above described communicate. For this purpose thehorizontal partition 7 does not extend to the Wall opposite the mainoutlet-flue, but is arranged to leave a space next to said wall, wherebythe upper set of oor-flues 8 may communicate with those below.Underneath the floor of each chamber are waste-heat tlues l1, extendinglongitudinally along the sides on which the furnaces are located. vExtending upwardly from these waste-heat flues 11 are a series ofvertical iiues 12, arranged along the sides of the chamber close to thebags of the furnaces. In order to secure a better distribution of theproducts of combustion', these waste-heat dues are divided by apartition-Wall 13 into two portions, which communicate with the verticalflues 12 near the respective ends of the chamber. The waste-heat flues1l of each chamber communicate with the main outletflue 10 of theadjacent chamber through openings provided for the purpose, saidopenings being provided with suitable dampers 14 for regulating saidopenings independently of each other. The main outlet-dues also areprovided with dampers 15 for controlling the draft therein or directingit into the adjacent waste-heat lues.

The operation of my device is as follows: The products of combustionfrom the furnaces 2 pass up the bags thereof into the kiln-chamber 1 andthence are deflected by the arched or domed roof downwardly through thepile of brick and pass outwardly through the perforations 5 in the floor4 into the channels or lines 8, located beneath the oor, but above thehorizontal partition 7 thereunder. The course of the draft through thesechannels or dues 8 is longitudinally of the kilnchamber. A part of suchproducts passes toward one end of the kiln-chamber and the other partpasses toward the opposite end of the kiln chamber, according as theypass through the door 4 upon one side or the other of the partition-wall9 of the channels or nues S. One part of the products of combustionpasses directly from the fluesS into the main outlet-flue l0. The otherpart passes around the end of the horizontal partition 7 and thence backunder said partition into the said main outlet-flue l0. From this iueflOthe products of combustion pass directly to the smoke-stack 16, or whenthe damper 15 is closed and the damper or dempers 14 are opened theproducts of combustion pass into the waste-heat ue 11 of anotherchamber.

loo

From this waste-heat liue 1l of the second chamber the products ofcombustion pass upwardly through the bags or wall-fines l2 of saidchamber, and their course through said chamber to the outlet-flue lO isthe same as hereinbefore described for the course of the products ofcombustion direct from the furnace.

It will be noted that the course of the draft from the furnace isupwardly through the bag and thence downwardly through the brick, sothat the advantage of a downdraft-furnace is secured. It will be furthernoted that the direction of the draft through the licor-lines islengthwise of the kiln-that is, parallel with the side of the chamberupon which the furnace is located-so that there is a great uniformity inthe distribution of the products of combustion throughout the Hoorspace,and that the division of such oor-flues near the middle line of thechamber increases such uniformity by forcing the draft in oppositedirections lengthwise from the middle of the kiln. The dampers in thedifferent flues give the operator full control over the comparativedistribution of the drafts, and the connection of the waste-heat flue ofthe chamber direct to the initial bags or walltlues especially providedtherefor makes the distribution and control of the waste heat the vsameas the distribution and control of the original products of combustion.

Obviously the construction hereinbefore described may be changed withoutdeparting from my invention. For instance, the main -ioor may be solidinstead of perforated, in which case the upper set of fines or channelsmay be formed with the green brick.

What I claim is- 1. Acontinuous kiln comprisinga plurality of chambers,each chamber having furnaces and an outlet-due and a waste-heat flue,the waste-heat flue of each chamber communieating with bags arrangedvertically alongside of the furnace-bags of the same chamber.

2. A continuous kiln comprising a plurality of chambers, each chamberhaving furnaces and an outlet-due and a waste-heat flue, the outlet-lineof one chamber being arranged to communicate with the waste-heat fine ofanother chamber, and said waste-heat iiue being arranged below the flooralong the furnace side of the chamber and communicating with bagsarranged alongside of the furnace-bags, substantially as described.

8. Acontinuous kiln comprisingaplurality of chambers, each chamberhaving furnaces on the longitudinal sides thereof, a main out-l let-fluearranged transversely below the floor of said chamberand waste-heatflues arranged' longitudinally below said iioor near the sides thereof,the waste-heat flues of one chamber communicating with the outlet-tineof another chamber and opening into bags alongside of the correspondingfurnace-bags of its own chamber, substantially as described.

4c. A continuous kiln comprisinga plurality of chambers, each chamberhaving a furnace on one side thereof and a main outlet-flue arrangedbelow the floor of said chamber along the side next to saidfirst-mentioned side, and a waste-heat flue arranged below said dooralong said first-mentioned side,the waste-heat flue of one chambercommunicating with the -outlet-flue of another chamber and opening intobags alongside of the furnace-bag of its own chamber, substantially asdescribed.

5. A continuous kiln comprising aplurality of chambers, each chamberhaving a furnace on one side thereof,and a perforated ioor having uesparallel with said side and communicating with a main outlet-finearranged below the floor of said chamber along the side next to saidfirst-mentioned side, and a wasteheat liue arranged below said Hooralong said first-mentioned side, the waste-heat flue of one chambercommunicating with the outletflue of another chamber and opening intobags alongside of the furnace-bag of its own chamber, substantially asdescribed.

6. A continuous kiln comprising aplurality of chambers, each chamberhaving a furnace on one side thereof, and a perforated floor havingbelow ittwo sets of flues arranged one nnder the other and parallel withthe furnace side of said chamber, the fines of the upper setcommunicating at one end with the fines of the lower set and beingdivided by a transverse partition and both the upper and the lower linescommunicating at the other end with a main outlet-flue arranged belowthe floor of said chamber, and a waste-heat fine arranged below saidfloor along said first-mentioned side, the waste-heat flue of onechamber communicating with the outlet-due of another chamber and openinginto bags alongside of the furnace-bag of its own chamber, substantiallyas described. Y

7. A continuous kiln comprising a plurality of chambers, each chamberhavinga furnace on one side thereof and a main outlet-flue arrangedbelow the floor of said chamber along the side neXt to saidfirst-mentioned side, and a waste-heat fine arranged below'said iiooralong said first-mentioned side and having a partition extendinglongitudinally thereof for about one-half of its length, the waste-heatflue of one chamber communicating with the outlet-flue of anotherchamber and opening into bags alongside of the furnace-bag of its ownchamber, substantially as described.

8. A continuous kiln comprising aplurality of chambers, each chamberhaving a furnace on one side thereof and a main outlet-line arrangedbelow the lioor of said chamber along the side next to saidfirst-mentioned side, and a waste-heat flue arranged below said ooralong said first-mentioned side, the wasteheat flue of one chambercommunicating with the outlet-fine of another chamber and opening intobags alongside of the furnace-bag of its own chamber and dampers forcontrolling the draft.

9. Acontinuouskilncomprisingaplurality IOO IIO

of chambers, each chamber having a'furnace iiue of another chamber andopening into 1o on one side thereof, andaperforated floor havbagsalongside of the furnace-bag of its own ing fines parallel with saidside and comniuchamber and damper for controlling the draft, nicatingwith a main outlet-flue arranged besubstantially as described.

10W the floor of said chamber along the side next to said rst-mentionedside, and a Waste- WALTER P GRATH' heat iue arranged below said flooralong said In presence offirst-mentioned side, the Waste-heat flue ofWILLIAM P. CARR,

one chamber communicating with the outlet- HENRY A. KERSTING.

